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1 year ago

As discussed previously other researchers have studied

As discussed previously, other researchers have studied the decrease in hydrogen production that occurs during long-term APBR operation (Fontes Lima and Zaiat, 2012 and Penteado et al., 2013; and Fontes Lima et al., 2013). Based on the findings of these studies, it was used an estimated value of the Ritonavir concentration in the APBR to calculate the sOLR (Eqs. (1), (2), (3), (4), (5) and (6)).
To identify the optimal value of sOLR and obtain maximum values for VHP, a polynomial function was fit to the experimental data (Fig. 3) with the following result (Eq. (7)):equation(7)VHP=22450.76-72647.17(sOLR)+77290.12(sOLR)2-26253(sOLR)3R2=0.9722
Fig. 3. Correlation between volumetric hydrogen production mL-H2d-1Lreactor-1 and specific organic loading rate (g-Total carbohydrates g-VS−1 h−1) during APBR operation.Figure optionsDownload full-size imageDownload as PowerPoint slide
In this sense, it is strongly recommended that in future studies, the frequency and type of acidogenic biomass discharge (e.g. by gravity or pressure head) in packed-bed reactors be evaluated to maintain the value of sOLR at a constant level (near 0.97 g-Total carbohydrates g-VS−1 h−1) thus obtaining, a continuous and stable hydrogen production. Not least, periodicals discharge of aging cell may lead to a cellular renewal in the system producing hydrogen hindering the Wood–Ljungdahl pathway.

1 year ago

Iso conversional method The described model free methods are applied

Concerning the chlorinated samples, the degradation progress of WS INCB28060 expedited in terms of the heightened maximum weight loss rate (DMAX) coupled with the decrease in its corresponding temperature (TMAX), for either of the peaks in SI and SII. The tiny bump emerged on the right side of the first degradation peak is actually a featuring thermal event in PVC pyrolysis owing to the cracking of solid residue with polyene structure after dechlorination ( Bhaskar et al., 2006). As exhibited in Fig. 1b, the DTG-curve of Pap mixture with 10 wt.% PVC discloses an analogous shape to the chlorinated WS derivative. It also earns greater and smaller values of DMAX and TMAX, respectively, compared to those of the pure substrate, which implies the expedition on Pap degradation progress due to co-processing as well. However for Pap, pepsin impact is relatively weak when comparing its mixture’s DTG-curve in Fig. 1b to the WS’s in Fig. 1a, which can also be observed from the values of characteristic parameters such as DMAX and TMAX shown in Table 3.

1 year ago

Peroxidase activities were only detected in the P

Peroxidase activities were only detected in the P. ostreatus and I. andersonii extracts, while the low peroxidases content in the T. versicolor CCBAS614 culture (“5 wks”) resulted in non-detectable pertinent activities in the respective “Extract” treatment. Furthermore, no peroxidases activities were observed when OMW was used as substrate for the growth of the selected wood-rot fungi (“Control-t9”), as well as in the “Blank”, “Blank-Laccase” and “Blank-H2O2” treatments ( Fig. 6). This Gefitinib in accordance with the outcome of previous studies reporting late induction of Mn-dependent and -independent peroxidases ( D’Annibale et al., 1998, Koutrotsios and Zervakis, 2014 and Ntougias et al., 2012).
4. Conclusions
The majority of the wood-rot fungi demonstrated high OMW’s degradation which was correlated to the production of laccases and peroxidases. Culture extracts from selected strains reduced OMW phenolics within a nine days period. Addition of catalase resulted in high OMW’s color reduction without affecting fungal enzyme activities. The effluent showed an inhibitory effect during the early stages of laccase production/addition, not observed in the case of peroxidases. Moreover, decrease in phenolics was associated with enzymatic oxidation since thermal treatment of OMW suppressed dephenolization. White-rot fungal culture extracts can be applied in OMW degradation due to 'Gefitinib' their enzymes stability and activity.

1 year ago

Correlation matrix of the variables assessed

Correlation matrix of Tariquidar variables assessed in the comparative evaluation of the fungal strains examined.BiomassColorCODPhenolicsGILaccase (U/L)Laccase (U/g d.w.)MIP (U/L)MIP (U/g d.w.)MnP (U/L)MnP (U/g d.w.)Biomass–−0.584??−0.288−0.403??0.2940.333?0.1650.1840.1480.2800.229Color–0.2790.875??−0.525??−0.517??−0.487??−0.468??−0.452??−0.510??−0.499??COD–0.192−0.344?−0.376?−0.310?−0.170−0.159−0.100−0.087Phenolics–−0.568??−0.484??−0.494??& kidney stones inus;0.426??−0.417??−0.451??−0.452??GI–0.430??0.441??0.404??0.394??0.462??0.465??Laccase (U/L)–0.957??0.611??0.593??0.451??0.441??Laccase (U/g d.w.)–0.684??0.679??0.460??0.469??MIP (U/L)–0.997??0.816??0.837??MIP (U/g d.w.)–0.789??0.819??MnP (U/L)–0.991??MnP (U/g d.w.)–MIP: manganese-independent peroxidase; MnP: manganese peroxidase.?Statistically significant correlation at p < 0.05.??Statistically significant correlation at p < 0.01.Full-size tableTable optionsView in workspaceDownload as CSV

1 year ago

Table nbsp Scenario analysis Mode of transportCargo movement kilotonnes Distancea

When different transport modes were standardized to HKD 1 million value added in 2012 i.e. the same economic benefit, it Beta-Lapachone was found that air freight produced more GHG than sea freight (790.4 vs. 421.1) but required a substantial less amount of work done in terms of kilotonne-km than sea freight (832 vs. 34,805).
4.3. Sensitivity analysis of GHG emissions using Monte Carlo simulations and scenario analysis
According to the latest annual report published by the Airport Authority of Hong Kong (2013), 402 kilotonnes of air cargo were transported between Hong Kong and mainland China (mostly to Shanghai Pudong International Airport). If 50 percent of this cargo movement i.e. 201 kilotonnes was transported between Hong Kong and Shanghai in mainland China by sea, land on trucks, or land on trains, 194–226 kilotonnes of CO2-eq emission can be reduced (see Table 6). More specifically, the reduction of GHG emissions was 97, 110, or 113 kilotonnes of CO2-eq per 100 kilotonnes of cargo changing from air transport to land on trucks, land on trains, or sea transport, respectively.

1 year ago

Life cycle assessment Product category rules Standardization Greenhouse gas

Life StemRegenin 1 assessment; Product category rules; Standardization; Greenhouse gas emissions; Oil sands
1. Introduction
Comparisons between products derived from crude oil depend increasingly on the use of life cycle assessment (LCA) to calculate the intensity of greenhouse gas (GHG) emissions. This is done on a well-to-wheel basis (from extraction of crude oil to the use of final products such as transportation fuels) by including direct emissions (e.g., onsite generation of steam), and indirect emissions, such as from producers external to the crude oil production chain (e.g., electricity produced offsite) (WRI and WBCSD, 2012). Canada's oil sands are bituminous petroleum reserves that require energy-intensive extraction of extra heavy or ultra-heavy crude oil, and often additional upgrading when compared with their conventional equivalents (National Energy Board, 2006, p. 38). These requirements generally result in products derived from oil sands crudes that have higher life cycle GHG emissions (Bergerson et al., 2012).

1 year ago

Fig nbsp xA Stock market share of different

This illustrative example suggests the following observations:•Market shares for NGV refueling infrastructure were higher than market shares for NGVs in the beginning.•The ratio of both market shares tends to develop to one for early markets and to higher market shares for vehicles for more mature markets.
From the evidences collected by these studies, the following findings can be added:•There has to be some infrastructure as soon as there are vehicles on the market which approves the first finding in this BRL-54443 subsection.•Refueling stations have to economize in the short to medium term, so a model should reflect their profitability.•Fuel prices for AFVs should be lower than for conventional vehicles.
2.2. How does refueling infrastructure influence the adoption of AFVs?
Several studies analyze the adoption of AFV and their refueling infrastructure in general.
Dütschke et al. [35] reviewed the user acceptance studies on natural gas vehicles in Germany and set them into international context to find out how acceptance for electric vehicles could be increased [66]. Additionally, ribosomal RNA conducted a survey of 142 NGV drivers in Germany in 2010. The main barriers to NGV adoption identified in this comprehensive analysis are cost and the lack of infrastructure, although the infrastructure concern “was not referred to very often by the interviewees” [66]. Furthermore, concerns about infrastructure for NGV-interested people were lower than for non-interested car drivers [66].

1 year ago

Many algal species are highly sensitive

Although significant literature and reports are available on microalgae growth, more work needs to be undertaken. Photobioreactors are expensive to scale, so direct secretion of fuel molecules from algae Dacomitinib has attracted interest as a way of reducing the cost of harvesting. Use of algal strains which naturally secrete lipids or algae engineered to secrete lipids from the direct photosynthetic conversion can help in decreasing the downstream processing costs [116]. Both primary and secondary harvesting procedures are energy-intensive and expensive. Improving this aspect of algal processing will reduce costs associated with biogas and biodiesel production. Also, the development of more efficient and environmental friendly lipid extraction/transesterification processes is needed to improve the sustainability of algal biodiesel [117]. At large scale applications the use of artificial media is not profitable or viable, therefore the use of wastewater and flue gas (or other waste streams) would be highly recommended for microalgae cultivation [118]. The combination of wastewater treatment and other waste streams combined with anaerobic digestion of the microalgae after valuable lipids have been removed, improves the profitability of the plant considerably [119].

1 year ago

Table nbsp Properties of produced syngas

The basic benefit of polygeneration is to gain in thermodynamic efficiency through optimum integration of material and R-7128 flows to obtain all outputs simultaneously from the same unit in a more efficient way. Inherent complexity of a polygeneration unit than separate units for same outputs will be justified if a gain in thermodynamic efficiency through the process of integration into a single unit is obtained. In this paper, fuel energy savings ratio (FESR) is used as the parameter for evaluation of this gain in efficiency. FESR is indicated as the amount of fuel energy saved by the polygeneration system for the same output utilities relative to standard stand-alone units for each of these outputs. If F is the fuel energy required for the polygeneration to deliver certain outputs, and Fref (i.e. reference amount of fuel energy) is the amount of total fuel energy required for the same outputs from stand-alone standard plants each for one utility output then.equation(10)FESR=(Fref–F)Fref=1−FFrefequation(11)where,Fref=WGTηGT+WSTηST+Qutilityηboiler+methanol·CVethanolηeth

1 year ago

The PCR DGGE results demonstrated distinct

The PCR-DGGE results demonstrated distinct microbial community structures at different temperatures. After inoculating the microalgal broths with mesophilic seed sludge, some strains adapted to the new environmental conditions, but other strains could not acclimate themselves to those, resulting in different acidification performances.
4. Conclusions
This study examined the relationships between VFAs accumulation and bacterial community structure during acidogenic fermentation of microalgal Salirasib at different operating temperatures. Operating temperature had a significant effect on the performance of acidogenic fermentation, and elevating temperature resulted in more active acidogenesis. Further research on combining VFAs production from microalgae with various industrial processes is required for supporting commercial viability of VFAs recovery from microalgae.
Algae; Cyanobacteria; Biofuel; Biovolume; Multivariate statistics
1. Introduction
Even commercial-scale algal ponds cultivated in freshwater or seawater for high value products, many environmental (light and temperature), operational (pH, CO2 and nutrients) and biological (bacteria and fungi) parameters influence microalgal diversity and productivity ultimately affecting product quality and quantity (Kang et al., 2015 and Torzillo et al., 2003). In algal biotechnology applications like biofuels, it is mandatory to maintain the integrity of the dominant microalgal species, and hence wastewater treatment coupled biofuel applications have significant uncertainties. Moreover, the feasibility of controlling wastewater treatment ponds in terms of sustained dominant microalgal community and the mechanisms involved thereof are poorly understood (Park et al., 2013). In fact, unreliable nature of the algal harvest owing to these uncertainties is one of the critical factors which limit the use of wastewater for biofuel applications.